8fa3ed8014
Migrates pcpu_chunk definition and a few percpu static variables to an internal header file from mm/percpu.c. These will be used with debugfs to expose statistics about percpu memory improving visibility regarding allocations and fragmentation. Signed-off-by: Dennis Zhou <dennisz@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org>
34 lines
983 B
C
34 lines
983 B
C
#ifndef _MM_PERCPU_INTERNAL_H
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#define _MM_PERCPU_INTERNAL_H
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#include <linux/types.h>
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#include <linux/percpu.h>
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struct pcpu_chunk {
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struct list_head list; /* linked to pcpu_slot lists */
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int free_size; /* free bytes in the chunk */
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int contig_hint; /* max contiguous size hint */
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void *base_addr; /* base address of this chunk */
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int map_used; /* # of map entries used before the sentry */
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int map_alloc; /* # of map entries allocated */
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int *map; /* allocation map */
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struct list_head map_extend_list;/* on pcpu_map_extend_chunks */
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void *data; /* chunk data */
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int first_free; /* no free below this */
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bool immutable; /* no [de]population allowed */
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int nr_populated; /* # of populated pages */
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unsigned long populated[]; /* populated bitmap */
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};
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extern spinlock_t pcpu_lock;
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extern struct list_head *pcpu_slot;
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extern int pcpu_nr_slots;
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extern struct pcpu_chunk *pcpu_first_chunk;
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extern struct pcpu_chunk *pcpu_reserved_chunk;
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#endif
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